Mazda B-Series 1997 Workshop Manual page 462

ON-BOARD DIAGNOSIS SYSTEM
FT
STEP INSPECTION
- -
ACTION
11 Key OFF.
Disconnect vacuum hose at EG13 valve and connect hose
to a vacuum gauge.
Key ON, engine off.
Observe vacuum gauge while performing the following:
-
Lightly tap on EVR solenoid and wiggle EVR solenoid
connector and harness.
'
Is fault ind~cated?
Yes Isolate fault and repair or replace as
necessary.
Go to step 13.
Reconnect vacuum hose and go to next step.
Key OFF.
Remove EVR solenoid vent cap if equipped.
Remove filter and inspect for contamination and excessive
1
water absorption.
Inspect EGR vacuum hose for possible blockage or
pinching.
Is EVR solenoid vent or filter contaminated or vacuum line
/
plugged?
Yes Repair or replace EVR :solenoid or EGR
vacuum hose as necessary.
Go to next step.
Unable to duplicate and/or identify fault at this
time. Go to "Intermittent Concerns."
=
page FT-69
13
/
Perform After Repair Procedure to ensure customer's concern has been resolved.
A
6BUOFT-070
TEST PIN 65 DPFE SIG
-
DIFFERENTIAL
TEST PIN 91 SIG RTN
-
PFE (DPFE)
SENSOR
TEST PIN 90 VREF
-
CONNECTOR
(VIEW
FROMPIN
SIDIE)
'TEST PlNS LOCATED ON BREAKOUT BOX
MF1707-B
TEST PIN 71/97 R
TEST PIN 47 BRIP EVR
(VIEW
FROM
PIN SIDE)
TEST PlNS LOCATED ON BREAKOUT BOX
MF1708-C